8 x Northern Lights Fem AF

Germinated the seeds for couple of days in a wet paper towel. 8/8 success with the seeds and one seeds seemed to grow two stems from the same seed. I left the twins as they are for the time being. As the seeds are autoflowering, I put them in their final pot straight away (10l). Soil is a mix of 2/4 basic market soil, 1/4 seedling mix/cactus soil and 1/4 perlite and vermiculite. I put couple of centimeters of pot gravel in the bottom of the pot and also made several holes for drainage. The seedlings spent first couple of days under some 10-40W plant lights as I prepared the actual grow area. A bit of stretching appeared during the first days, but got this under control after relocating the plants under the HID (metal halide). Used the Sunmaster flowering bulb (as seen in the pictures) for a couple of days and switched to Sunmaster Cool bulb which was the original plan all along. Watered first time at the end of week 1 with 0,2l of water and some Biobizz Root Juice and Heaven. The grow tent is in a room with around 13-15C average temp so I added a thermostat controlled space heater to keep the nighttime temperature around 18C inside the tent. There´s a 125mm extractor attached to the cooltube and I keep it running when the light is on. As the surrounding environment is relatively cool, the tent tends to cool down too much if the extractor is on during the night. The exhaust tube is now installed on the lower exhaust port, but will switch it to the higher one once I move the light upwards when the plants grow. The airflow is not optimal at the moment when it´s coming in and going out from the lower ports, but then again there´s no heat issues at the moment anyways. I´m actually planning on relocating the extractor outside the tent during flowering hoping the decreased airflow near the light will help bringing the tent average daytime temp around 25C. A 28cm fan hanging from the ceiling keeps the plants in motion 24/7.